A pigeon in operant chamber #1 regularly receives a pellet of food after every ten pecks at a red disk, no matter how long it takes. A rat in operant chamber #2 regularly receives a pellet of food for the first bar press it makes after ten minutes have passed, no matter how many bar presses it makes. The pigeon is on a schedule of reinforcement, and the rat is on a schedule of reinforcement.

A)fixed-ratio; fixed-interval
B)fixed-interval; fixed-ratio
C)fixed-ratio; variable-interval
D)fixed-ratio; variable-ratio

One of the results of the 2010 golf of mexico oil spill is the threat to various species in the goths ecosystem it disturbed and in some cases forever altered the of the gulf coast

Identify the example of when situation and time are key to assessing risk of harm in a research study: a study on the efficacy of a behavioral intervention for smoking cessation involves both adults and teenagersasking women if they have had an abortionresearch on the prevalence of hiv-infected individuals in communitiesa survey about sexually transmitted diseases

Which of the following is true of cultural syndromes of distress? a. it refers to attributing pathological symptoms to normative cultural differences. b. refers to misinterpreting culturally sanctioned behavior as expressions of pathological symptoms. c. it refers to the ways that communities and cultural groups communicate and express their distressing thoughts, behaviors, and emotions. d. it refers to patterns of symptoms that tend to cluster together for individuals in specific cultural groups, communities, or contexts.